Molarity (M) of an aqueous solution containing of anhydrous in solution at is . Its molality will be . (nearest integer) [Density of solution ]

Question

Molarity (M) of an aqueous solution containing  of anhydrous  in  solution at  is . Its molality will be  . (nearest integer) [Density of solution ]

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Strategy:
 Converting Molarity to Molality requires the solution density. First find the mass of the solvent by subtracting solute mass from total solution mass.

Step 1: Quantities in 1 L solution
- Solute: . Mass .
- Solution: . Mass  (or  per text). 
Using : Mass .

Step 2: Calculate molality

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